File lockout

Yes, when the administrators group has been removed from the folder or files, normally when a user removes the permissions for the administrators from his home drive.

You need to take ownership of the folders and then replace the permissions. You will probably have to do this from the server.

You might have to do this from a higher level in the directory structure and let the permissions propagate to the lower folders.

Try cloning a new user from the Administrator account. Now try accessing the files through this new account. If this does not work try removing the shares and then accessing the files. I have also been able to use an "Attrib" from the command prompt. Something like C:\attrib *.* -R
Hope this helps!

Answer1 is correct, you need to Take Ownership of the folder to then be able to access it and make changes. Only an Administrator-level account can take ownership of anything like this (a member of the Administrators group).

Here are the steps:
Right-click on the folder -> Properties
Click the Security Tab.
Under the Ownership button, click the Ownership button.
A small window will come up saying Directory Name: name of folder. It will also list the name of the owner. Below this is a button labeled Take Ownership.
Click that button.
Now, click OK on the Properties window, just to be sure!
Ok, you now have ownership of the folder. You can now go back to the Security Permissions to set the ACL info.

hope this helps